Confident contribution from medic and orderly (3-2)
I believe the answer is:
can-do
'confident' is the definition.
(as in a can-do attitude)
'contribution from medic and orderly' is the wordplay.
'contribution from' indicates a hidden word (the concealed answer 'contributes' to the clue).
'CAN-DO' is hidden within 'medic and orderly'.
(Other definitions for can-do that I've seen before include "Showing willingness to get the job done" , "Positive" , "Positive-thinking" .)